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BOSTON (CBS) – Ever since last Wednesday’s surprisingly weak debate performance by the president, there’s been a ton of armchair analysis and psychoanalysis of why he seemed so half-hearted about expressing his vision for a second term and rebutting Mitt Romney’s criticisms.

And while there’s no higher job in his chosen career than the presidency, you couldn’t blame Mr. Obama if he’s had enough.

As it did his predecessors, the years in office have visibly aged him, and his first term has come at an especially stressful and corrosive time.

There is no guarantee a second one will be any easier. His children are still young enough to need him, and he is still young enough to have an impact and make money while returning to something more closely resembling a normal life.

It wouldn’t surprise me if there’s some truth to the notion that, maybe even subconsciously, the president isn’t so sure he wants another four years of this, and that’s what we saw in debate number one.

Then again, let’s hold off on a final diagnosis until we see debates two and three.

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